~mozillateam/mozilla-devscripts/mozilla-devscripts

# Copyright (c) 2009 Benjamin Drung <bdrung@debian.org>

#

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to deal

# in the Software without restriction, including without limitation the rights

# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be included in

# all copies or substantial portions of the Software.

# 

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

# THE SOFTWARE.

# Reference: https://developer.mozilla.org/en/Toolkit_version_format

import sys

def decode_part(part):

    """Decodes a version part (like 5pre4) to

       <number-a><string-b><number-c><string-d>"""

    subpart = [0, "", 0, ""]

    # Split <number-a>

    length = 0

    for i in xrange(len(part)):

        if part[i].isdigit() or part[i] in ("-"):

            length += 1

        else:

            break

    if length > 0:

        subpart[0] = int(part[0:length])

    part = part[length:]

    # Split <string-b>

    length = 0

    for i in xrange(len(part)):

        if not (part[i].isdigit() or part[i] in ("-")):

            length += 1

        else:

            break

    subpart[1] = part[0:length]

    part = part[length:]

    # Split <number-c>

    length = 0

    for i in xrange(len(part)):

        if part[i].isdigit() or part[i] in ("-"):

            length += 1

        else:

            break

    if length > 0:

        subpart[2] = int(part[0:length])

    subpart[3] = part[length:]

    # if string-b is a plus sign, number-a is incremented to be compatible with

    # the Firefox 1.0.x version format: 1.0+ is the same as 1.1pre

    if subpart[1] == "+":

        subpart[0] += 1

        subpart[1] = "pre"

    # if the version part is a single asterisk, it is interpreted as an

    # infinitely-large number: 1.5.0.* is the same as 1.5.0.(infinity)

    if subpart[1] == "*":

        subpart[0] = sys.maxint

        subpart[1] = ""

    return subpart

def decode_version(version, verbose=False):

    """Decodes a version string like 1.1pre1a"""

    parts = version.split(".")

    decoded_parts = map(decode_part, parts)

    if verbose:

        print "I: Split %s up into %s." % (version, decoded_parts)

    return decoded_parts

def compare_subpart((a, b)):

    # A string-part that exists is always less-then a nonexisting string-part

    if a == "":

        if b == "":

            return 0

        else:

            return 1

    elif b == "":

        if a == "":

            return 0

        else:

            return -1

    else:

        return cmp(a, b)

def compare_part((x, y)):

    compared_subparts = filter(lambda x: x != 0,

                               map(compare_subpart, zip(x, y)))

    if compared_subparts:

        return compared_subparts[0]

    else:

        return 0

def compare_versions(version1, version2, verbose=False):

    a = decode_version(version1, verbose)

    b = decode_version(version2, verbose)

    if len(a) < len(b):

        a.extend((len(b) - len(a)) * [[0, "", 0, ""]])

    if len(b) < len(a):

        b.extend((len(a) - len(b)) * [[0, "", 0, ""]])

    result = filter(lambda x: x != 0, map(compare_part, zip(a, b)))

    if result:

        return result[0]

    else:

        return 0

def extract_upstream_version(debian_version):

    # remove last part separated by a dash (1.0-2 -> 1.0)

    parts = debian_version.split('-')

    if len(parts) > 1:

        del parts[-1]

    upstream_version = '-'.join(parts)

    # remove epoch

    parts = upstream_version.split(':')

    if len(parts) > 1:

        del parts[0]

    upstream_version = ':'.join(parts)

    return upstream_version

def convert_debian_to_moz_version(debian_version, verbose=False):

    upstream_version = extract_upstream_version(debian_version)

    # compatibility: strip +nobinonly and +build

    parts = upstream_version.split('+')

    if len(parts) > 1 and parts[-1] == "nobinonly":

        del parts[-1]

    if len(parts) > 1 and parts[-1].startswith("build"):

        del parts[-1]

    upstream_version = '+'.join(parts)

    moz_version = upstream_version.replace("~", "")

    return moz_version

def convert_moz_to_debian_version(moz_version, epoch=0, verbose=False):

    parts = decode_version(moz_version, verbose)

    # tranform parts

    for i in xrange(len(parts)):

        (number_a, string_b, number_c, string_d) = parts[i]

        part = ""

        if string_d != "":

            part = "~" + string_d

        if number_c != 0 or string_d != "":

            part = str(number_c) + part

        if string_b != "":

            part = "~" + string_b + part

        parts[i] = str(number_a) + part

    debian_version = ".".join(parts)

    if epoch != 0:

        debian_version = str(epoch) + ":" + debian_version

    return debian_version